This thing is quite tough to dismantle. My grandfather bought this one Ebay, I am not sure of the model but it most resembles from what I have seen online a 370 ... My question is: What would cause it to run perfectly in neutral and reverse fine, but when you put it in forward, it starts to slow way down and you can hear the strain of the motor, and you can feel the tension in the front knob, yknow considering both directions run on one belt, I dont think its the belt and I dont believe it is a motor problem... help! Where can I find a service manual without buying it online